Final answer:
The secondary blast effect is the phase of a blast that causes injuries from being thrown against hard objects or by flying debris, as seen in the Chelyabinsk meteor event.
Step-by-step explanation:
The phase of a blast resulting from individuals being thrown by the blast and impacting walls, ground, or any hard object is referred to as the secondary blast effect. This phase can cause significant injury, as seen in scenarios such as the injuries from the shattered glass following the Chelyabinsk meteor event. Secondary blast injuries typically occur due to flying debris and structural collapse, leading to blunt or penetrating trauma.